Conceptual design of the Kumgang laser: a high-power coherent beam combination laser using SC-SBS-PCMs towards a Dream laser Download: 996次
1 Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
2 Department of Advanced Green Energy and Environment, Handong Global University, Heunghae-eup, Buk-gu, Pohang-si, Gyeongbuk 791-708, Republic of Korea
3 Laser Spectronix, 219 Gasan digital 1-ro, Geumcheon-gu, Seoul 153-704, Republic of Korea
Figures & Tables
Fig. 1. The schematic diagram of the Kumgang laser system.
下载图片 查看原文
Fig. 2. The MOPA beam combination laser with the amplitude combining method using PBSs: EM1–EM6, energy meters.
下载图片 查看原文
Fig. 3. MOPA beam combination laser with the amplitude combining method using a VBG.
下载图片 查看原文
Fig. 4. Types of SBS-PCM: (a) conventional SBS-PCM and (b) self-phase-locking SBS-PCM with PZT.
下载图片 查看原文
Fig. 5. Experimental setup of the self-phase-locked SBS-PCM: BS, beam splitter; W1 and W2, wedges; CM1 and CM2, concave mirrors.
下载图片 查看原文
Fig. 6. Experimental result of the self-phase-locked SBS-PCM. (a) A mosaic intensity pattern. It is generated by lining up one line of the intensity profile pattern recorded at each CCD image. (b) The measured relative phase. The standard deviation of the measured phase fluctuation is .
下载图片 查看原文
Fig. 7. Experimental setup of beam combination using an SBS-PCM and a feedback loop: M, mirror; W, wedged window; CM, concave mirror.
下载图片 查看原文
Fig. 8. Experimental result of beam combination using an SBS-PCM and a feedback loop: (a) without operating the feedback loop and (b) with operation of the feedback loop.
下载图片 查看原文
Fig. 10. Measured phase fluctuation of four-beam combination using an SBS-PCM with the amplitude dividing method.
下载图片 查看原文
Fig. 11. Experimental setup of the four-beam combination amplifier using an SBS-PCM with the wavefront dividing method: HWP1 and HWP2, half-wave plates; BS, beam splitter; P1–P3, Prisms; M1–M3, mirrors; AMP1–AMP4, amplifiers; C1–C4, concave mirrors; W, wedge.
下载图片 查看原文
Fig. 12. Measured phase fluctuation of the four-beam combination amplifier using an SBS-PCM with the wavefront dividing method.
下载图片 查看原文
Fig. 13. Schematic diagram of the front end: FC/APC, fiber connector/angled physical contact; WDM, wavelength division multiplexor; BPF, bandpass filter; FC, fiber collimator; HR1 and HR2; high-reflectivity mirrors; A1 and A2, apertures.
下载图片 查看原文
Fig. 14. Schematic diagram of the pre-amplifier: RL1–RL5, relay lens pairs; PR1 and PR2, polarization rotators; HR, high-reflectivity mirror.
下载图片 查看原文
Fig. 15. Schematic diagram of the main amplifier: RL1–RL20, relay lens pairs; CM1–CM4, concave mirrors.
下载图片 查看原文
Fig. 16. Schematic diagram of 2D laser processing using the Kumgang laser.
下载图片 查看原文
Fig. 17. Schematic diagram of the generation of a fs/ps laser using the Kumgang laser as a pump source: OPA1–OPA3, optical parametric amplifiers.
下载图片 查看原文
Table1. Beam combination methods.
Type | Subtype | Examples of combining device |
---|
IBC | Frequency combining | Dichroic mirror, prism, grating | | Side-by-side combining | Lens array, mirror, wedge | | Polarization combining | PBS | CBC | Wavefront combining | Lens array, mirror, wedge | | Amplitude combining | PBS, beam splitter, grating |
|
查看原文
Table2. CBC methods.
| Wavefront combining | Amplitude combining |
---|
Beam positions of combined beams | Different (tiled) | Same (overlapping) | Pros | Output power is always the same | High beam quality (same as input beams) | Cons | Lower beam quality | Output power is degraded when the phase control is imperfect | Combining devices | Lens array, mirror, wedge, etc. | PBS, beam splitter, grating, etc. |
|
查看原文
Hong Jin Kong, Sangwoo Park, Seongwoo Cha, Heekyung Ahn, Hwihyeong Lee, Jungsuk Oh, Bong Ju Lee, Soungwoong Choi, Jom Sool Kim. Conceptual design of the Kumgang laser: a high-power coherent beam combination laser using SC-SBS-PCMs towards a Dream laser[J]. High Power Laser Science and Engineering, 2015, 3(1): 010000e1.